BARRIE- Traffic along Highway 400 is moving slowly this afternoon near Essa Road after a tractor-trailer crashed into the dividing guardrail.
The crash happened just after 10:30 a.m. when the trailer jackknifed and went through the barrier between the northbound and southbound lanes.
Fire, police and paramedics were on scene, and the highway was closed between Dunlop and Essa in both directions.
Some motorists were trapped for more than an hour, and there were reports of drivers heading the wrong way and exiting on the Bayfield Street on-ramp to escape traffic.
OPP said one lane southbound, closest to the guardrail, would remain closed for the day for repairs.
One northbound lane was reopened as of 12:30 p.m.
Police have also removed the tractor-trailer from the scene.